hadoop SimpleKeyProvider 源码
haddop SimpleKeyProvider 代码
文件路径：/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/SimpleKeyProvider.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.fs.azure;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.ProviderUtils;
/**
* Key provider that simply returns the storage account key from the
* configuration as plaintext.
*/
@InterfaceAudience.Private
public class SimpleKeyProvider implements KeyProvider {
private static final Log LOG = LogFactory.getLog(SimpleKeyProvider.class);
protected static final String KEY_ACCOUNT_KEY_PREFIX =
"fs.azure.account.key.";
@Override
public String getStorageAccountKey(String accountName, Configuration conf)
throws KeyProviderException {
String key = null;
try {
Configuration c = ProviderUtils.excludeIncompatibleCredentialProviders(
conf, NativeAzureFileSystem.class);
char[] keyChars = c.getPassword(getStorageAccountKeyName(accountName));
if (keyChars != null) {
key = new String(keyChars);
}
} catch(IOException ioe) {
LOG.warn("Unable to get key from credential providers.", ioe);
}
return key;
}
protected String getStorageAccountKeyName(String accountName) {
return KEY_ACCOUNT_KEY_PREFIX + accountName;
}
}
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